Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0962250dbadde7a…

MALICIOUS

PDF

97.3 KB Created: 2021-08-21 06:55:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 029f8856f8c6bd8bc8838bf504dbe77c SHA-1: ee1c8b50245ab856ba930da407e63c9a9e193bb2 SHA-256: e0962250dbadde7ab0a8b374488b4cf62a70ba0e434981dfb5ef62ab4003fb9c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://drafthe.ru/uplcv?utm_term=mr+smith+goes+to+washington+worksheet+pdf PDF link annotation
    • http://kovacsoltvaskerites.hu/images/file/7935010449.pdfIn PDF document text
    • http://nemdanangpho.com/uploads/2021-06-29/images/files/17849807490.pdfIn PDF document text
    • https://www.c2commercial.com/wp-content/plugins/super-forms/uploads/php/files/67244c048041191b07a71ba8fe60b72e/743958764.pdfIn PDF document text
    • https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608ce9514652c---16230488376.pdfIn PDF document text
    • http://sivam.pl/files/file/95195759437.pdfIn PDF document text
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160840a6c8d794---40057993764.pdfIn PDF document text
    • http://nikolalepojevic5.com/multimedia/file/refemuwor.pdfIn PDF document text
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076c91f4d97d---wekenipopumepuze.pdfIn PDF document text
    • https://www.varishastalari.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f6b3ed24a1---24945964847.pdfIn PDF document text
    • http://randygordonlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/34562735102.pdfIn PDF document text
    • https://www.emmabowman.com/wp-content/plugins/super-forms/uploads/php/files/68eb635abe6076e2aec8bf82b9798716/73785897269.pdfIn PDF document text
    • https://implantsdentairesdesmoulins.com/upload/editor/file/noragitigadigimidizuw.pdfIn PDF document text
    • http://anhuicrew.com/upload_fck/file/2021-5-16/20210516121642843975.pdfIn PDF document text
    • http://chronicles.ae/userfiles/files/fumubebedilexamavo.pdfIn PDF document text
    • http://otohondamientay.com/upload/files/wugovolajivatewijebolito.pdfIn PDF document text
    • http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/16086da2417d3a---jerujidirozego.pdfIn PDF document text
    • https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611bbcff7da10---jemanufus.pdfIn PDF document text
    • http://hanasushichoice.com/uploads/files/27106907179.pdfIn PDF document text
    • http://donauwell.at/userfiles/file/maxigujifixujunovut.pdfIn PDF document text
    • https://www.meditech.cz/ckfinder/userfiles/files/7544277120.pdfIn PDF document text
    • http://ltmetal.com/userfiles/files/88295030061.pdfIn PDF document text
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/1610ab39e3c44e---fotijojuz.pdfIn PDF document text
    • https://anthonygillant.com/userfiles/file/57214729706.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/1e776bcfedfed04f40d9b2ab6653bad7/voxevetidobebedata.pdfIn PDF document text
    • https://www.kalirich.com/wp-content/plugins/super-forms/uploads/php/files/12dgpkkit35jnf88ejb93c8qh5/vegoz.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011871.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11871 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00013088.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13088 11068 bytes
SHA-256: a64999ce497a14621a72a3b8997b3e2fb78812ad027749ac2014f75ce2274a04
font_02_sfnt_off00014a01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A01 17688 bytes
SHA-256: 21d02ac7b1d5c803ebac960795d988c022b7adbe5a5ca31468b1f15f348a9cf4

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